Patent US3586969A successfully refreshed from Google Patents.
US3586969A
Expired / Lapsed
US
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System and method for measuring a circuit's step function time response
Assignee: AT&T Inc
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Filing: 1969-06-13
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Granted: 1971-06-22
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Expires: 1989-06-13
Abstract
Abstract A simple means for determining two values of the time response that a circuit under test would have to a unit step input is disclosed. The apparatus utilizes the frequency response of the circuit to provide this time response information, thus eliminating the usual requirement that the testing circuitry have a faster response time than the circuit being tested.
Inventors
- 👤 John A Rudisill Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:42
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/28; G01R27/32
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
Apparatus for determining the duplicating time of an electrical circuit expressed as a value of frequency comprising: means for applying to said electrical circuit an electrical signal that continuously varies in frequency from a lower value to an upper value and in magnitude inversely with the frequency; means for continuously subtracting the magnitude of said applied signal from the magnitude of the output signal of said electrical circuit generated in response to said applied signal; means for accumulating the sum of the results of said subtraction; means for detecting a null in said sum; and means for adjusting said upper frequency limit until a null occurs, thereby establishing the desired frequency value.
Claim 2
Dependent Claim
112 words
Apparatus for determining the duplicating time of an electrical circuit expressed as a value of frequency comprising: means for applying to said electrical circuit an electrical signal that continuously varies in frequency from a lower value to an upper value and in magnitude inversely with the frequency; means for continuously subtracting the magnitude of said applied signal from the magnitude of the output signal of said electrical circuit generated in response to said applied signal; means for accumulating the sum of the results of said subtraction; means for detecting a null in said sum; and means for adjusting said upper frequency limit until a null occurs, thereby establishing the desired frequency value.
Claim 3
Dependent Claim
106 words
Apparatus for determining the peak response time of an electrical circuit expressed as a value of frequency comprising; means for applying to said electrical circuit an electrical signal that continuously varies in frequency from a lower value to an upper value; means for continuously subtracting the magnitude of said applied signal from the magnitude of the output signal of said electrical circuit generated in response to said applied signal; means for accumulating the sum of the results of said subtraction; means for detecting a null in said sum; and means for adjusting said upper frequency limit until a null occurs, thereby establishing the desired frequency value.
Claim 4
Dependent Claim
106 words
Apparatus for determining the peak response time of an electrical circuit expressed as a value of frequency comprising; means for applying to said electrical circuit an electrical signal that continuously varies in frequency from a lower value to an upper value; means for continuously subtracting the magnitude of said applied signal from the magnitude of the output signal of said electrical circuit generated in response to said applied signal; means for accumulating the sum of the results of said subtraction; means for detecting a null in said sum; and means for adjusting said upper frequency limit until a null occurs, thereby establishing the desired frequency value.
Claim 5
Independent Claim
112 words
The method of determining the duplicating time of an electrical circuit comprising the steps of: generating an electrical signal that continuously varies in frequency from a lower limit to an upper limit and in magnitude inversely with the frequency; applying said signal to said electrical circuit; subtracting the magnitude of said applied signal from the magnitude of the output signal of said electrical circuit generated in response to said applied signal accumulating the sum of the results of said subtraction; adjusting said upper limit of frequency until a null occurs in said sum; and dividing the value of the upper limit of frequency at which said null occurs into 2 pi .
Claim 6
Independent Claim
112 words
The method of determining the duplicating time of an electrical circuit comprising the steps of: generating an electrical signal that continuously varies in frequency from a lower limit to an upper limit and in magnitude inversely with the frequency; applying said signal to said electrical circuit; subtracting the magnitude of said applied signal from the magnitude of the output signal of said electrical circuit generated in response to said applied signal accumulating the sum of the results of said subtraction; adjusting said upper limit of frequency until a null occurs in said sum; and dividing the value of the upper limit of frequency at which said null occurs into 2 pi .
Claim 7
Independent Claim
106 words
The method of determining the peak response time of an electrical circuit comprising the steps of; generating an electrical signal that continuously varies in frequency from a lower limit to an upper limit; applying said signal to said electrical circuit; subtracting the magnitude of said applied signal from the magnitude of the output signal of said electrical circuit generated in response to said applied signal; accumulating the sum of the results of said subtraction; adjusting said upper limit of frequency until a null occurs in said sum; and dividing the value of the upper limit of frequency at which said null occurs into 2 pi .
Claim 8
Independent Claim
106 words
The method of determining the peak response time of an electrical circuit comprising the steps of; generating an electrical signal that continuously varies in frequency from a lower limit to an upper limit; applying said signal to said electrical circuit; subtracting the magnitude of said applied signal from the magnitude of the output signal of said electrical circuit generated in response to said applied signal; accumulating the sum of the results of said subtraction; adjusting said upper limit of frequency until a null occurs in said sum; and dividing the value of the upper limit of frequency at which said null occurs into 2 pi .
Claim 9
Independent Claim
125 words
The method of determining a representation of the duplicating time of an electrical circuit expressed as a frequency value comprising the steps of: generating an electrical signal that continuously varies in frequency from a lower limit to an upper limit and in magnitude inversely with the frequency; applying said signal to said electrical circuit; subtracting the magnitude of said applied signal from the magnitude of the output sigNal of said electrical circuit generated in response to said applied signal accumulating the sum of the results of said subtraction; and adjusting said upper limit of frequency until a particular value of frequency is reached whereat a null occurs in said sum of results, said particular value of frequency being the desired representation of said duplicating time.
Claim 10
Independent Claim
125 words
The method of determining a representation of the duplicating time of an electrical circuit expressed as a frequency value comprising the steps of: generating an electrical signal that continuously varies in frequency from a lower limit to an upper limit and in magnitude inversely with the frequency; applying said signal to said electrical circuit; subtracting the magnitude of said applied signal from the magnitude of the output sigNal of said electrical circuit generated in response to said applied signal accumulating the sum of the results of said subtraction; and adjusting said upper limit of frequency until a particular value of frequency is reached whereat a null occurs in said sum of results, said particular value of frequency being the desired representation of said duplicating time.
Claim 11
Independent Claim
120 words
The method of determining a representation of the peak response time of an electrical circuit expressed as a frequency value comprising the steps of: generating an electrical signal that continuously varies in frequency from a lower limit to an upper limit; applying said signal to said electrical circuit; subtracting the magnitude of said applied signal from the magnitude of the output signal of said electrical circuit generated in response to said applied signal; accumulating the sum of the results of said subtraction; and adjusting said upper limit of frequency until a particular value of frequency is reached whereat a null occurs in said sum of results, said particular value of frequency being the desired representation of said peak response time.
Claim 12
Independent Claim
120 words
The method of determining a representation of the peak response time of an electrical circuit expressed as a frequency value comprising the steps of: generating an electrical signal that continuously varies in frequency from a lower limit to an upper limit; applying said signal to said electrical circuit; subtracting the magnitude of said applied signal from the magnitude of the output signal of said electrical circuit generated in response to said applied signal; accumulating the sum of the results of said subtraction; and adjusting said upper limit of frequency until a particular value of frequency is reached whereat a null occurs in said sum of results, said particular value of frequency being the desired representation of said peak response time.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |